<template>
	<div class="icon-box">
		<el-input :value="iconValue" placeholder="请选择图标" @focus="openDialog" readonly ref="inputRef">
			<template #append>
				<el-button :icon="customIcons[iconValue]" />
			</template>
		</el-input>
		<el-dialog v-model="dialogVisible" title="请选择图标" top="50px" width="66%">
			<el-input v-model="inputValue" placeholder="搜索" size="large" :prefix-icon="Icons.Search" />
			<el-scrollbar v-if="Object.keys(iconsList).length">
				<div class="icon-box">
					<div v-for="item in iconsList" :key="item" class="icon-item" @click="selectIcon(item)">
						<component :is="item"></component>
						<span>{{ item.name }}</span>
					</div>
				</div>
			</el-scrollbar>
			<el-empty description="未搜索到您要找的图标~" v-else />
		</el-dialog>
	</div>
</template>

<script setup lang="ts" name="selectIcon">
import { ref, computed } from 'vue'
import * as Icons from '@element-plus/icons-vue'

// 接收参数
defineProps<{ iconValue: string }>()

const customIcons: { [key: string]: any } = Icons

// 打开 dialog
const dialogVisible = ref(false)
const openDialog = (e: any) => {
	// 直接让文本框失去焦点，不然会出现显示 bug
	e.srcElement.blur()
	dialogVisible.value = true
}

const emit = defineEmits(['update:iconValue'])

// 选择图标(触发更新父组件数据)
const selectIcon = (item: any) => {
	dialogVisible.value = false
	emit('update:iconValue', item.name)
}

// 监听搜索框值
const inputValue = ref('')
const iconsList = computed((): { [key: string]: any } => {
	if (!inputValue.value) return Icons
	let result: { [key: string]: any } = {}
	for (const key in customIcons) {
		if (key.toLowerCase().indexOf(inputValue.value.toLowerCase()) > -1) result[key] = customIcons[key]
	}
	return result
})
</script>

<style scoped lang="scss">
@import './index.scss';
</style>
